This dataset contains airborne vertical profile measurements of atmospheric CO2 and CH4 concentrations over four cities in Eastern China: Beijing, Nanjing, Hengshui, and Shangqiu. Data were collected on 14 May, 2023.


Dataset Description:

South_trip.xlsx:
Contains observational data collected during the flight segment from Beijing (takeoff) to Nanjing (landing).
North_trip.xlsx:
Contains observational data collected during the flight segment from Nanjing (takeoff) to Beijing (landing).
Both files include the following variables: date, time, latitude, longitude, altitude, dry CO2 mixing ratio, dry CH4 mixing ratio, air temperature and specific  humidity.

F4_5min_average.xlsx:
Provides 5‑minute averaged data from southbound and northbound flight transects, organized into two separate sheets. All variables have been averaged over 5‑minute intervals. Each sheet contains time, latitude, and the following altitude‑stratified variables:
Dry CO2 mixing ratio (above 2 km: up2km; below 2 km: down2km)
Dry CH4 mixing ratio (above 2 km: up2km; below 2 km: down2km)

F5_verticle_data.xlsx:
Provides measurements during ascent (UP) and descent (DOWN) phases over four cities. City codes are as follows:
BJ: Beijing
NJ: Nanjing
HS: Hengshui
SQ: Shangqiu
Each sheet includes time, altitude, dry CO2 mixing ratio, dry CH4 mixing ratio, potential temperature and specific humidity.

F6_HSSQ_DOWN.xlsx:
Contains descent-phase (DOWN) data for Hengshui (HS) and Shangqiu (SQ). Separate sheets are provided for each city, each including time, altitude, dry CO2 mixing ratio, and dry CH4 mixing ratio.